Team Hulse James J. Joshua M. Daniel P. Adam P. James M. Shane J.

Ionized gas Interstellar medium Amplified De- dispersion And on-line folding Prepfold plot/ Single-pulse plot Pulse profile TOA INTRODUCTION  PULSAR  MECHANISM 1)Telescope receives radio waves 2) Analog to Digital conversion 3)Data Acquisition by monitor and control system 4) First level data processing software 5) Change what data is recorded by monitor and control software 6) Second level data analysis software Permission given by Ferdinand Camarote

Test Candidate J

This is the same pulsar, but from the European data archive. It was taken with the Arecibo telescope. Test Candidate J

Double Pulses? The axis on this pulsar is tilted in a way that the rotation axis is pointed towards but slightly off to one side. So when it rotates we pick up the inter-pulse. Test Candidate J

Our First Candidate 19:03-08:48 I believe this is a very good candidate because there is a very nice pulse and in the time vs. phase you can see a great signal and the DM peak has a clean peak.

But this happens to be the same pulsar? GBT Data 19:03-08:48

What is a binary pulsar?

 A binary pulsar is a pulsar with a companion (another pulsar) orbiting around each other  Often it is a white dwarf or a neutron star  The companion of the pulsar is very difficult to discover  The easiest way to discover one is by using a radio telescope because pulsars emit impulses that are extremely regular and stable in the radio wave region  We find binary pulsars when the GBT picks up both signals and we can find a huge change in the period over time

How did we know it is a Binary Pulsar? ? We can tell it is a Binary Pulsar because the period changes very fast. From that we can notice that there are 2 pulsars. Good peak for the DM You can see 2 pulses. Small error bar. Dark lines are vertical High X 2

Where is it in our galaxy? Binary pulsar SUN

The Math Period.039 sRate of change of the period x Radius of magnetic field Km Strength of magnetic field gauss Characteristic Age 2,577,822,280 years

 The first Binary Pulsar was found by Russell Hulse.  He got a Noble Prize in physics in  The Binary Pulsar he found was PSR B PSR B  He was born in November 28, 1950 in New York

Pulsar Candidate Data: Noise

Candidate Test Data

GBT Data

Candidate Test Data

GBT Data

Mathematical Calculations James is on his way to becoming an astrophysicist.

Formulas

James’ Pulsar for Tonight!

James’ Pulsar Found in Data

P P-dot Diagram

TEAM HULSE WOULD LIKE TO THANK THE FOLLOWING:  Sue Ann Heatherly  Dr. Rachel Rosen  Dr. Maura McLaughlin  Dr. Duncan Lorimer  Ryan Lynch  Joe  PSC Teachers & Student Mentors  NRAO Staff